Station Map for the Occultation by (1777) Gehrels at Sunday, 2009 January 18 (~ 23:50 UT)

V-Magnitude of target star HIP 48177: 8.3 mag
Johnson B-V Colour Index: + 0.2
Spectral type A2
The UCAC2 gives a „pseudo-R magnitude“ of  8.6 mag

The max duration is expected to be 1.6 sec with a max drop of 6.6 mag.
The event will take place at an altitude of  52 deg and at azimuth 146 deg. The sun will be at an altitude of – 61 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ± 2.26  path widths.
The probabilities to see a positive event:

Centre line: ~  18 %
Path limits: ~  17 %
1 sigma lines:  ~ 8 %
2 sigma lines: ~ 1 %

(Calculation according to Raymond Dusser, E.A.O.N. Circular #10)

PLEASE REMEMBER: Predictions are sometimes wrong. Please observe even with a small probability.
Let other observers know about you observing plans: Announce you station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2009_01/0118_1777_20029.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090118_20029_Sites.txt

Good luck with your observation!

Oliver Klös

IOTA-ES